Forward to the past: it's 1985; it's morning in Ronald Reagan's America, and Robert Zemeckis's irresistible time-travel fantasy was released that year, and is now back in cinemas. What a time capsule. That opening sequence, with Michael J Fox as skateboarding teen Marty McFly, cheekily hitching a ride to school by hanging on to backs of speeding cars and trucks – to the music of Huey Lewis's The Power of Love – summons up the breezy, unreflective optimism of the age like nothing else. Marty is whisked back to the 1950s by a wacky time-machine and comes face to face with his nerdy teenage dad George (Crispin Glover) and also his unrecognisably gorgeous mom Lorraine (Lea Thompson), with whom George has yet to reach first base. But driven by an attraction she cannot understand, Lorraine decides that this new Marty kid is an absolute dreamboat, so to protect his own future existence, Marty must deflect Lorraine's adoration to poor old George. The counter-Freudian drama is handled with easy wit and flair, like a Shakespearian disguise comedy, and it made a whopping star of Fox.